Us Code § 6603 - Deposits made to suspend running of interest on potential underpayments, etc.

Full text of Us Code United States Code § 6603 — Deposits made to suspend running of interest on potential underpayments, etc., with citation guidance and answers to common questions.

§ 6603. Deposits made to suspend running of interest on potential underpayments, etc.

(a) Authority to make deposits other than as payment of tax

A taxpayer may make a cash deposit with the Secretary which may be used by the Secretary to pay any tax imposed under subtitle A or B or chapter 41, 42, 43, or 44 which has not been assessed at the time of the deposit. Such a deposit shall be made in such manner as the Secretary shall prescribe.

(b) No interest imposed

To the extent that such deposit is used by the Secretary to pay tax, for purposes of section 6601 (relating to interest on underpayments), the tax shall be treated as paid when the deposit is made.

(c) Return of deposit

Except in a case where the Secretary determines that collection of tax is in jeopardy, the Secretary shall return to the taxpayer any amount of the deposit (to the extent not used for a payment of tax) which the taxpayer requests in writing.

(d) Payment of interest

(1) In general

For purposes of section 6611 (relating to interest on overpayments), except as provided in paragraph (4), a deposit which is returned to a taxpayer shall be treated as a payment of tax for any period to the extent (and only to the extent) attributable to a disputable tax for such period. Under regulations prescribed by the Secretary, rules similar to the rules of section 6611(b)(2) shall apply.

(2) Disputable tax

(A) In general

For purposes of this section, the term "disputable tax" means the amount of tax specified at the time of the deposit as the taxpayer's reasonable estimate of the maximum amount of any tax attributable to disputable items.

(B) Safe harbor based on 30-day letter

In the case of a taxpayer who has been issued a 30-day letter, the maximum amount of tax under subparagraph (A) shall not be less than the amount of the proposed deficiency specified in such letter.

(3) Other definitions

For purposes of paragraph (2)—

(A) Disputable item

The term "disputable item" means any item of income, gain, loss, deduction, or credit if the taxpayer—

(i) has a reasonable basis for its treatment of such item, and

(ii) reasonably believes that the Secretary also has a reasonable basis for disallowing the taxpayer's treatment of such item.

(B) 30-day letter

The term "30-day letter" means the first letter of proposed deficiency which allows the taxpayer an opportunity for administrative review in the Internal Revenue Service Independent Office of Appeals.

(4) Rate of interest

The rate of interest under this subsection shall be the Federal short-term rate determined under section 6621(b), compounded daily.

(e) Use of deposits

(1) Payment of tax

Except as otherwise provided by the taxpayer, deposits shall be treated as used for the payment of tax in the order deposited.

(2) Returns of deposits

Deposits shall be treated as returned to the taxpayer on a last-in, first-out basis.

(Added Pub. L. 108–357, title VIII, §842(a), Oct. 22, 2004, 118 Stat. 1598; amended Pub. L. 116–25, title I, §1001(b)(1)(D), July 1, 2019, 133 Stat. 985.)


Editorial Notes

Amendments

2019—Subsec. (d)(3)(B). Pub. L. 116–25 substituted "Internal Revenue Service Independent Office of Appeals" for "Internal Revenue Service Office of Appeals".


Statutory Notes and Related Subsidiaries

Effective Date

Pub. L. 108–357, title VIII, §842(c), Oct. 22, 2004, 118 Stat. 1599, provided that:

"(1) In general.—The amendments made by this section [enacting this section] shall apply to deposits made after the date of the enactment of this Act [Oct. 22, 2004].

"(2) Coordination with deposits made under revenue procedure 84–58.—In the case of an amount held by the Secretary of the Treasury or his delegate on the date of the enactment of this Act as a deposit in the nature of a cash bond deposit pursuant to Revenue Procedure 84–58, the date that the taxpayer identifies such amount as a deposit made pursuant to section 6603 of the Internal Revenue Code (as added by this Act) shall be treated as the date such amount is deposited for purposes of such section 6603."

Subchapter B—Interest on Overpayments

Sec.
6611.
Interest on overpayments.
6612.
Cross references.

        

About This Section

26 U.S.C. § 6603 is part of Title 26 of the United States Code. The United States Code is the official codification of federal statutes maintained by the Office of the Law Revision Counsel of the U.S. House of Representatives. Congress amends the Code through new public laws, which are eventually incorporated into the relevant title.

This section may be cited in legal writing as 26 U.S.C. § 6603. For the most current official text, including any recent amendments, use the official source links below. Do not rely on this page as the sole authority for legal citation or litigation.

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Sources

Source: official Us Code text · Last verified 2026-08-27

Frequently Asked Questions About Us Code § 6603

What does United States Code § 6603 cover?

Section 6603 ("Deposits made to suspend running of interest on potential underpayments, etc.") is part of the United States Code, the codified statutory law of Us Code. It sets out the legal rule or procedure described in the text above. Statutes are amended regularly, so always verify against the official source.

How do I cite Us Code § 6603?

A common citation format is "United States Code § 6603" (Us Code). Legal writing may require the code abbreviation, section number, and year or edition. Match the style required by your court, professor, or publisher.

Is this the official text of Us Code law?

No. This page is for research and education and may not include the most recent amendments. For official current law, check the Us Code official source linked on this page or consult a licensed Us Code attorney.

How does Us Code § 6603 apply to my situation?

Statutes are interpreted in context, and application depends on your specific facts. Only a licensed attorney in Us Code can advise on how this section applies to you. Contact your state or local bar association for a referral.

Sources & Verification

Not legal advice. Verify against the official source and consult a licensed attorney in Us Code.